The violinist Rui Hanazawa, Tsukasa's best friend, becomes Tsukushi's first serious romantic interest. He is a quiet and cold guy, but he has a soft spot for his close friend and Tsukushi's idol, the model Todo Shizuka, whom he harbored feelings for since childhood. His character is a bit complex, and always has changing feelings for Tsukushi, but above all cares about her in a friendly way.